Engine General Information and Diagnosis: 1A-28
C13 (Use of mode select switch)
Step Action Yes No
1 1) Remove the front fender. Refer to “Front Side Exterior
Parts Removal and Installation in Section 9D (Page 9D-
6)”.
2) Turn the ignition switch OFF.
3) Check the IAP sensor coupler for loose or poor contacts.
If OK, then measure the IAP sensor input voltage.
4) Disconnect the IAP sensor coupler.
5) Turn the ignition switch ON.
6) Measure the voltage at the R wire and ground.
If OK, then measure the voltage at the R wire and B/Br
wire.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
IAP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R
– (–) terminal: B/Br)
Is the voltage OK?
Go to Step 2. • Loose or poor
contacts on the ECM
coupler.
• Open or short circuit
in the R wire or B/Br
wire.
I831G1110026-01
I831G1110027-01
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